User Guide

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NAV PAGE
These are the pages you’ll be using most often - the ones via
which the system gives you required navigation information in a
concise form.
NAV1 PAGE
This is the
primary naviga-
tion display; it’s
the page you’ll
probably use most often, and has just about everything you need
on it.
Depending on whether you’re flying long a leg from one way-
point to the next, or on a direct-to routing, you’ll see either the
FROM waypoint or the D
-> symbol, plus the TO waypoint, on the
first line. The active waypoint is now displayed on the right side of
the screen. The space on the left, where it was displayed, now
shows your ground speed.
The second
line can be cycli-
cally selected to
show either a
graphic CDI or a
numeric display
that’s very useful if you’re more than five miles off course.
To change
the CDI scale
(sensitivity) cur-
rently in use, tog-
gle the CDI field
to the “CDI Scale” display and click the >CLR button. The values
allowed are +/- 5, 1.25, or 0.3 nm.
The third line shows the desired track (DTK) and your actu-
al track made good over the ground (TK). As long as you fly the
airplane to keep these numbers the same, you’re either on course
or flying exactly parallel to it.
The fourth line has another cyclic field that can show the TO or
FROM bearing, plus time to the waypoint. Click directly on the field
to toggle between TO and FROM.
ALT PAGES
The ALT 1 page is used to set the system for current baro-
metric pressure (since it gets its altitude input from your airplane’s
encoding altimeter, not from GPS). The second and third lines dis-
play MSA, the minimum safe altitude between your present posi-
tion and the waypoint and, if you have a multileg flight plan
active, MESA, the highest minimum enroute altitude between
your present position and the final destination. These are often dif-
ferent: for example, if you’re flying over flat country but there’s a
range of mountains between you and the destination, you might
see something like MSA 3000, MESA 14000.
The ALT 2 page is used to program the system for “advisory
vertical navigation.” By entering current altitude, desired final alti-
tude, distance prior to (minus) or after (plus) a waypoint, ground-
speed, and desired rate of descent, you can receive advisories: the
“altitude you should be at” vs your current altitude. This is very use-
ful in descent planning, particularly in high-performance aircraft.
DIRECT TO PAGE
This page
allows you to
navigate directly
from your pres-
ent position to
your destination.
and displays the destination identifier. If the GPS is on a waypoint
page, the “direct-to” key defaults to the identifier of the waypoint.
Otherwise, it defaults to the active waypoint on the NAV1 page.
When no waypoint is active, the identifier is blank.
Modify the destination by clicking the the identifier field,
then press the ENT key to accept. If your new destination is valid,
the GPS will display the waypoint page corresponding to the
identifier. Press ENT to accept or CLR to return to the Direct To
page. Accepting will send you to the NAV1 page and begins nav-
igation to the designated waypoint. If invalid, the GPS willchange
to the USR page and allow you to create the waypoint.
Appendices
Appendices